// Example 2.10.b;Numerical Aperture
clc;
clear;
close;
n1=1.450;//Waveguide Refractive Index
n2=1.447;//Cladding Refractive Index
h= 1.3;// Wavelenght in micrometers
NA=sqrt(n1^2-n2^2);// Numerical Aperture
disp(NA,"Numerical Aperture is")